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. Author manuscript; available in PMC: 2014 Jul 9.
Published in final edited form as: Biochemistry. 2013 Jun 27;52(27):10.1021/bi400498d. doi: 10.1021/bi400498d

Figure 3.

Figure 3

MqnC-mediated hydrogen atom abstraction by the 5′-dA radical occurs at the C4′-position of DHFL. (A) Mass spectrum demonstrating 66% deuterated [4-2H]-DHFL. (B) 5′-dAd derived from MqnC reaction using DHFL as the substrate. (C) 5′-dAd derived from MqnC reaction using [4-2H]-DHFL as the substrate. Calculated exact mass of DHFL: 295.1; [4-2H]-DHFL: 296.1; and 5′-dAd: 250.1 m/z ([M-H]−).